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Indeed, I don't recommend encrypting JS or HTML at all!
I would use a compressor, so it wouldn't be readable anymore.
In my opinion JS and HTML encryption is off limits...
Here's something useful that doesn't encrypt, but compresses JS in a way that only very few would even try to decipher the code.

You can use Dean Edwards' packer to compress and make code more difficult to read, almost unreadable.
Values and variable names are concatenated in a string seperated by a |-sign, and I think they're mixed up randomly so that makes it more unreadable.